Optimized recovery method of wave field characteristics of tunnel drilling source of drilling jumbo and its engineering application
Ronghui Bai , Shaoshuai Shi , Weidong Guo , Zhenyan Tian
Optimized recovery method of wave field characteristics of tunnel drilling source of drilling jumbo and its engineering application
This study addresses the significant issue of wavefield mixing in seismic data acquired from tunnel drilling jumbo during urban tunnel construction. This paper compares and analyzes the effect of time-domain cross-correlation in the wavelet transform domain through simulation, and concludes that the combination of the time–frequency cross-correlation in the wavelet transform domain, which excels in noise suppression and in the ability of extracting related information, and the algorithm of spike deconvolution. An optimized recovery method for the wavefield characteristics of drilling jumbo drilling source is implemented. This paper focuses on the single-arm drilling source signal of drilling jumbo as the research object, and the equivalent pulse signal of the drilling source is obtained through the spike deconvolution. The equivalent pulse signal is then optimized using time–frequency cross-correlation in the wavelet transform domain, which improves the ability of extracting the valid reflective information and enhances the effect of the recovery of seismic data of drilling source of the drilling jumbo. The recovery effectiveness of the method of spike deconvolution-wavelet domain cross-correlation on the seismic recordings of the drilling source is analyzed, and the method is applied to practical engineering scenarios, thereby validating the effectiveness and feasibility of the method.
Drilling jumbo / Spike deconvolution / Cross-correlation / Seismic data recovery / Advanced geological prediction
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